253423442031523 has 4 divisors (see below), whose sum is σ = 253621894219200. Its totient is φ = 253224989843848.

The previous prime is 253423442031457. The next prime is 253423442031527. The reversal of 253423442031523 is 325130244324352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 253423442031523 - 2⁴¹ = 251224418775971 is a prime.

It is a super-2 number, since 2×253423442031523² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253423442031523.

It is not an unprimeable number, because it can be changed into a prime (253423442031527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99226091923 + ... + 99226094476.

It is an arithmetic number, because the mean of its divisors is an integer number (63405473554800).

Almost surely, 2^{253423442031523} is an apocalyptic number.

253423442031523 is a deficient number, since it is larger than the sum of its proper divisors (198452187677).

253423442031523 is a wasteful number, since it uses less digits than its factorization.

253423442031523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198452187676.

The product of its (nonzero) digits is 2073600, while the sum is 43.

Adding to 253423442031523 its reverse (325130244324352), we get a palindrome (578553686355875).

The spelling of 253423442031523 in words is "two hundred fifty-three trillion, four hundred twenty-three billion, four hundred forty-two million, thirty-one thousand, five hundred twenty-three".